Surface Mount Clips work well for permanent and seasonal installations of C9and C7 lighting on flat surfaces. These clips are shaped like an "S" and mount to flat surfaces using screws. Once the the clip is screwed in, the light socket covers the screw while the lighting wire is held on the top and bottom part of the S. Can be installed so the lamps face horizontal or vertical. Sold in packs of 100. Your satisfaction is our #1 priority and if you have any issues, please us know and we will gladly help.